package collection;




import java.util.ArrayList;
import java.util.Collection;

public class CollectionDemo2 {
    public static void main(String[] args) {
        Collection c = new ArrayList();

        c.add(new Point(1,2));
        c.add(new Point(3,4));
        c.add(new Point(5,6));
        c.add(new Point(7,8));
        c.add(new Point(9,0));
        System.out.println(c);
        Point p = new Point(1,2);
        boolean contains = c.contains(p);
        System.out.println("是否包含给定元素："+contains);
    }
    //c1.containsAll(c3) 判断当前集合中是否包含给定集合中的所有元素
    //c1.removeAll(c3)删除交集
    //c1.retainAll(c3)取交集
}
